Collapsible core.



J. YEMIKER. COLLAPSIBLE GORE.

APPLICATION FILED AUG. 1'7I 1912.

Patented Nov. 18, 1913.

UNITED smg as r rnnr orrion.

JOHN YEMIKER, 0F AKRON, OHIO, ASSIGNOR OF EORTY-NINE ONE-I-IUNDREDTHS TO ROBERT H. FOWLER, OF'AKBON, OHIO.

COLLAPSIBLE coma.

Specification of Letters Patent.

at-entail Nov. 1 8, 1 913.

T 0 all IF/I077], it may concern:

Be itknown that I, JOHN Ynmnnn, a citizen of the United States, residing at Akron, in the county of Summit and State of Ohio, have invented certain new and useful Improvements in Collapsible Cores, of which the following is a specification. reference being had tothe accompanying drawings.

This invention comprehends certain new and useful improvements in collapsible cores or mandrels designed particularly for use in molding rubber tires, or analogous articles.

The invention has for its primary object a core, the parts of which are so constructed and arranged that the necessity of employing contracting rings, mandrels. or bolts for drawing the sections of the core together and holdin them in assembled relation, is entirely d o-ne awaywvith. whereby the core will possess to a considerable degree, the characteristics of simplicity, durability and eiiiciency in operation, as well as reducing to a minimum, the time required for assembling and disassembling the scctions of the core. And the invention also aims to generally improve devices of this class and to render them more useful and commercially desirable.

With these and other will more fully appear proceeds, the invention consists in certain constructions, arrangements and combinations of the parts that I shall hereinafter i'ully describc and claim.

For a full understanding of the invention, reference is to be had to the following dcscription and accompanying drawing, in whieh--- Figure l is an elevation of my improved collapsible core; Fig. 2 is a transverse sectional view thereof on the line 2-2 of Fig. 1; and Fig. 3 is a detailed perspective, view of one of the connecting members hereinafter specifically described.

{Jo-rt spending and like parts are referred to in the following description and desig noted in the accompanying drawing by like reference characters.

My improved collapsible core is composed of a plurality of separable sections which are segmental in form and tubular. In the present instance, ,four of these sections are employed, the same being designated 1 2, 3 and 4-, although it is to be understood that objects in view, as

the invcnticn is not limited in this regard.

as the description In the present embodiment of the invention, the adjoining ends of the sections 2, 8 and 4 are substantiall radially disposed, but the adjoining ends 0 the sections 2, 4 and l are disposed in planes oblique to the radii of the annular body of the core, the inner portion of the section 1 being of greater length than the outer or peripheral portion, whereby the member 1 will serve in the nature of a key and may be readily moved inward out of' engagement with the obliquely arran ed ends of the adjacent members 2 and 4 w on it is desired to collapse the core, preparatory to removing it from the molded tire casing. Manifestly, the abutting ends of the sections 2, 3, and l may be radially or otherwise disposed, because these sections may be removed from the tire casing after the key member 1 has been removed.

Cach ot' the sections which together form the body of the core is formed on its inner side with a widened or thickened segmental flange, the ends of said flanges, when the sections are assembled, abutting against each other to constitute an annular thickened head which .is adapted to he engaged by connccting wedge members 5. The number of the connecting members 5 is equal to the number of segmental core. members employed, each of said connecting members being formed with an elongated body ortion which terminates at each end in a cad 6 which, in the present instance, has its side edges plane, and oblique to each other, joined together at their outer ends by a transversely straight or plane end surface. The adjoining ends of the segmental members 1, 2 and 3 are formed with connnunicatiug recesses 7 which correspond in shape, when the parts are assembled, to the connecting members 5 and which, like the connecting members, are transversely tapered from one side face of the head to the other, whereby when the connecting members 5 are driven laterally into the recesses, they will tend to draw the segmental members together and hold them tightly in assembled relation.

In order to prevent sidewise movement, the segmental members which form the body of the core, are formed at their ends and at their peripheral edges with registering re cesses 8 designed to receive keys 9, in an evident manner.

From the foregoing description in'connection with the accompanying drawing, the

operation of my improved collapsible core will be apparent. In the practical use of the device, when setting up the core, the parts are assembled with their ends abutting, and the connecting members are driven into the recesses 7, thereby producing a wedging action and a drawing or tensioning etlecton the segmental members 1, 2, 3 and 4 and tendin'gto bind them closely together in assembled relation. The keys 9 areslipped into place and prevent any sidewise movement or displacement, as above specified.

i It Will thus be seen that I have provided a I very simple, durable and efficient construction of collapsiblecore, wherein the parts are so arranged anclgfoianed thatthe opera tion of assemblingv and disassemblin the parts may be very quickly and easily e ected and Without, the use of contracting rings or boltsr 4 lVhile the accompanying drawing illustrates what I believe to be the preferred embodiment of my invention, it isto be under-' stood that the invention is not limited thereto, but that various changes may be made in the construction, arrangement and proportions of the parts without departingfrom the scope of the invention, as defined in the appended claims. 0

What I claim is 1. A collapsible core for manufacturing pneumatic tires, comprising a plurality of cesses provided with enlarged ends, said recesses being transversely tapered,'and I- shaped connectmg members embodying elongated body portions and enlarged dovetailed and beveled heads, said connecting members tapering transversely and being adapted to be driven into the recesses with the heads lying in the enlarged ends of the latter, thereby drawing the sections together.

2. A collapsiblepneum'atic tire core, comprising a plurality of separable segmental abutting sections eachprovided with a flange at itsinn'er edge of rectangular form ',incross section, said flange being connected- 'with the main portlon or the section by a neck portion, the adjoining ends of said flanges being formed with corresponding and communicating recesses having enlarged inner ends, said recess-es being transversely tapered, I-shaped connecting members adapted to be driven into the recesses with the heads thereof lying in the enlarged inner ends of said recesses to draw the see tions together, said connecting members bemg tapered to correspond with the recesses,

and means to prevent lateral movementgof' the outer ends of the sect-ions.

3. A collapsible coretor pneumatic tires, comprising a plurality of separable abutting sections producing a circular body, each section being provided at its inner edge with an enlarged flange connected with the main portion thereof by a neck portion, the adjoining ends of said flanges being provided with corresponding and communicating recesses provided with dove-taihshaped inner ends, said recesses being transversely tapered, I-shaped connecting members adapted to be driven into the recesses with .the heads thereof lying in the enlarged inner ends of said recesses to draw thesections together, said connecting members being tapered to correspond with the recesses, and

means engaged in the outer ends of the sec--' tions to prevent lateral latter.

In. testimony whereof I hereunto afii'x my signature in the presence of two witnesses;

OHN YEMIKER. f

movement of the Witnesses:

LUCILE SMITH, T. R. VVAIILFILG. 

